| Soil quality of natural grassland, cropland and pasture in the Karst mountain area of Guizhou was compared in the study.
The results showed that there were significant difference of soil physical, chemical and effective micronutrient of natural grassland, cropland and the pasture in Karst mountain region. The BD袁porosity and capillary water holding in soil of study area showed better pasture than natural grassland, and cropland was the worst. The soil of study area was high-acid, pH and between 3.49~4.44. And the pH of pasture and cropland soil was higher than natural grassland. The organic matter and total nitrogen in pasture soil were better than cropland and natural grassland. The available nitrogen, available phosphorus and available potassium in natural grassland were lower than pasture and cropland. The density of available iron, zinc and boron in 0 to 50 centimeter soil was natural grassland > cropland > pasture.The density of available copper and molybdenum in 0 to 50 centimeter soil was cropland > natural grassland > pasture. The density of available manganese in 0 to 50 centimeter soil was cropland > pasture > natural grassland. |
